Abstract:
The article presents the results of a comparative analysis of the bearing capacity of bored piles
with a drilling displacement system (DDS), obtained by tests for static load and according to GOST standards, as
well as the results of tests for compression of the surrounding soil after installing the pile with DDS. These DDS
piles are created by rotary drilling with a simultaneous full displacement of the soil in a horizontal direction. The
optimal design of DDS piles can be obtained in soils that allow for a horizontal displacement, which causes an
increase in the shaft’s resistance. It is shown that drilling and ramming technologies of pile foundation
construction play an important role in modern urban planning, but they are not fully universal. Actively
developing, they replace traditional methods using dynamic and vibratory impacts, as they are more gentle to
nearby buildings, which is most relevant for cities with dense urban development. According to the project
design, the field tests of DDS bored piles with a diameter of 410 mm, and length of 6 m was performed by two
static loading tests. The static loading tests were performed by GOST 5686-2012. This paper shows the results of
the load-settlement and feed rate of the deep auger for pile diagrams 1 and 2 from those field tests that make it
possible to determine the bearing capacity of piles on a given soil. The analysis signified that the bearing
capacity of the six-meter-high bored piles meets the design requirements.
